scalebarsettings.h

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#ifndef SCALEBARSETTINGS_H
#define SCALEBARSETTINGS_H
 
#include <QFont>
#include <QObject>
#include <QPen>
 
class ScaleBarSettings : public QObject
{
    Q_OBJECT
 
public:
    enum Units {
        Auto,
        Meters,
        Feet,
        Kilometers,
        Miles
    };
    Q_ENUM(Units)
 
    enum Position {
        BottomLeft,
        BottomRight,
        TopLeft,
        TopRight
    };
    Q_ENUM(Position)
 
    Q_PROPERTY(QPen      pen             READ pen             WRITE setPen             NOTIFY changed)
    Q_PROPERTY(QFont     font            READ font            WRITE setFont            NOTIFY changed)
    Q_PROPERTY(Units     units           READ units           WRITE setUnits           NOTIFY changed)
    Q_PROPERTY(Position  position        READ position        WRITE setPosition        NOTIFY changed)
    Q_PROPERTY(int       maxBarLength    READ maxBarLength    WRITE setMaxBarLength    NOTIFY changed)
    Q_PROPERTY(int       labelDecimals   READ labelDecimals   WRITE setLabelDecimals   NOTIFY changed)
    Q_PROPERTY(bool      compactNotation READ compactNotation WRITE setCompactNotation NOTIFY changed)
 
    explicit ScaleBarSettings(QObject *parent = nullptr);
 
    [[nodiscard]] QPen     pen()             const { return m_pen; }
    [[nodiscard]] QFont    font()            const { return m_font; }
    [[nodiscard]] Units    units()           const { return m_units; }
    [[nodiscard]] Position position()        const { return m_position; }
    [[nodiscard]] int      maxBarLength()    const { return m_maxBarLength; }
    [[nodiscard]] int      labelDecimals()   const { return m_labelDecimals; }
    [[nodiscard]] bool     compactNotation() const { return m_compactNotation; }
 
    void setPen(const QPen &pen);
    void setFont(const QFont &font);
    void setUnits(Units units);
    void setPosition(Position position);
    void setMaxBarLength(int length);
    void setLabelDecimals(int decimals);
    void setCompactNotation(bool compact);
 
    [[nodiscard]] QString formatLabel(double metres, bool rawUnits = false) const;
 
    [[nodiscard]] double roundedMetres(double metres) const;
 
signals:
    void changed();
 
private:
    QPen     m_pen             { QPen(Qt::black, 2) };
    QFont    m_font            { QFont(QStringLiteral("sans-serif"), 8) };
    Units    m_units           { Auto };
    Position m_position        { BottomLeft };
    int      m_maxBarLength    { 100 };
    int      m_labelDecimals   { -1 };   // -1 = auto
    bool     m_compactNotation { false };
};
 
#endif // SCALEBARSETTINGS_H